I'm logged in as the Administrator. My old profile is still there, and I've checked to see that all my old files are still there on the C & D drives. I guess I'm ready to create a new profile and transfer everything over to it?

I would first do a system file check first. If it finds corrupt files and manages to repair them, you might not have to create a new admin account. Furthermore, if you have corrupt files, a new admin account may not work either.

David, if you're still there: scan completed, corrupt files found. "...but was unable to fix some of them. Details are included in the CBS.Log windir\Logs\CBS\CBS.log. For example C:\Windows\Logs\CBS\CBS.log. Note that logging is currently not supported in offline servicing scenarios." So, based on your earlier advice, I'll create a new admin account and copy everything over.

Keep your fingers crossed. The scan report is not good. It might not be detrimental, but not good news.

Ok. Give it a try. In your Built-in Admin account, create a new admin just like the one you failed to login. The method is NOT the same as enabling Built-in Admin account. Can you do that by yourself or do you need help?